topic Re: Get planarface under element in Revit API Forum

Get planarface under element

mr.engineer.aec — Sun, 27 Oct 2019 13:36:09 GMT

Hi guys,

I want to get under planarface of pile cap.

Is there any method to get it from solid?

i can only get all planarface from solid 😞

Thank in advanced.

Re: Get planarface under element

jeremytammik — Sun, 27 Oct 2019 16:43:18 GMT

Yes, of course.

It is very simple.

You say you know how to retrieve all the planar surfaces.

Well, then you can iterate over them and ignore all that are not horizontal, e.g., by applying a predicate method like this to the planar surface normal:

    public static bool IsVertical( XYZ v )
    {
      return IsZero( v.X ) && IsZero( v.Y );
    }

https://github.com/jeremytammik/the_building_coder_samples/blob/master/BuildingCoder/BuildingCoder/Util.cs#L228-L231

Next, you can sort the remaining horizontal planar surfaces by the Z coordinate of their Origin property:

https://www.revitapidocs.com/2020/9671f9cf-6779-d6ca-8af4-91ac44b986ac.htm

The one with the lowest Z coordinate is presumably the one you are after.

Re: Get planarface under element

mr.engineer.aec — Sun, 03 Nov 2019 04:57:12 GMT

Hi @jeremytammik

Thank for your reply.

I am still finding workarounds according to your instructions.

Hope you can help me next time.

Re: Get planarface under element

jeremytammik — Sun, 03 Nov 2019 19:53:33 GMT

Thank you for your appreciation. My pleasure entirely.

Re: Get planarface under element

mr.engineer.aec — Mon, 04 Nov 2019 04:51:18 GMT

Hi @jeremytammik

I solved my issue by your guide.
Now, i have new issue, hope you can help me.

I want to create floor from edgeloops of bottom face.

I get edgeloops but i can't curvearray to use create floor method.
How to get curvearray of bottom face ?
Thank in advance

               EdgeArrayArray curveloop = planarFace.EdgeLoops;
              //Floor newfloor = doc.Create.NewFloor(curveloop, true);

Re: Get planarface under element

naveen.kumar.t — Mon, 04 Nov 2019 05:23:53 GMT

Hi @mr.engineer.aec ,

try using the below code

Use GetEdgesAsCurveLoops() method

                Face f;               
                IList<CurveLoop> curveLoops = f.GetEdgesAsCurveLoops() as IList<CurveLoop>;
                CurveArray CA = new CurveArray();
                foreach(CurveLoop CL in curveLoops)
                {
                    CurveLoopIterator CLi = CL.GetCurveLoopIterator();
                    while(CLi.MoveNext())
                    {
                        CA.Append(CLi.Current);
                    }
                }

I hope this helps.

Re: Get planarface under element

mr.engineer.aec — Mon, 04 Nov 2019 05:47:31 GMT

Hi @naveen.kumar.t

thank for your reply.

I write code like you but after run, Bug is visible.
Can you hekp me to solve this issue ?
Many thanks

IList<CurveLoop> curveloop = planarFace.GetEdgesAsCurveLoops() as IList<CurveLoop>;
                                CurveArray curveArray = new CurveArray();
                                foreach(CurveLoop cl in curveloop)
                                {
                                    CurveLoopIterator cli = cl.GetCurveLoopIterator();
                                    while (cli.MoveNext())
                                    {
                                        curveArray.Append(cli.Current);
                                    }
                                    Floor newfloor = doc.Create.NewFloor(curveArray, true);
                                }

Re: Get planarface under element

naveen.kumar.t — Mon, 04 Nov 2019 07:32:52 GMT

Hi @mr.engineer.aec ,

The error shows with the curves you have , you can't create a floor. can you check whether you got the proper face curve array?

The face curves should help you to construct a floor.

check whether the curves are valid.

Re: Get planarface under element

mr.engineer.aec — Mon, 04 Nov 2019 07:54:18 GMT

Thank @naveen.kumar.t

this is my bad. I solved.

Re: Get planarface under element

Revitalizer — Mon, 04 Nov 2019 08:20:05 GMT

Hi,

the input curves are not sorted.

RevitAPI.chm says:

"[...]Face.GetEdgesAsCurveLoops

Orientations of the curves and curve loops match the orientations of the face's edges and edge loops. The order of the CurveLoops should be considered as arbitrary.[...]"

Edit:

Oops, seems that I didn't read it carefully.

Curves in CureLoops are sorted, returned CurveLoops List is not.

Revitalizer

Re: Get planarface under element

mr.engineer.aec — Mon, 04 Nov 2019 09:03:46 GMT

Hi @naveen.kumar.t

Is there any way to offset curve to create floor like under picture. inside red line is curve get from face as above.

I search CreateViaOffset Method, but i don't know how to use it yet.

Can you show me how to use this method ?
Thank in advanced